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Author Question: The nucleus of the cell directs cellular activity. True ... (Read 34 times) |
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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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The longest a person has survived after a heart transplant is 24 years.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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The horizontal fraction bar was introduced by the Arabs.